Primes obtained from other primes by prefixing a 7.

Terms

a(0) =73a(1) =719a(2) =743a(3) =761a(4) =773a(5) =797a(6) =7103a(7) =7109a(8) =7127a(9) =7151a(10) =7193a(11) =7211a(12) =7229a(13) =7283a(14) =7307a(15) =7331a(16) =7349a(17) =7433a(18) =7457a(19) =7487a(20) =7499a(21) =7523a(22) =7541a(23) =7547a(24) =7577a(25) =7607a(26) =7643a(27) =7673a(28) =7691a(29) =7727